Anti-Patterns

switch_case_pregmatch.php

<?php
class switchNotMatched { }

function doInteger($i) {
    echo $i;
    if ($i < 100) {
        echo " is less than 100.";
    }
    echo "\n";
}

function doString($i) {
     echo str_rot13($i)."\n";
}

function doSomething($input) {
    static $nomatch = null;
    if (empty($nomatch)) {
        $nomatch = new SwitchNotMatched();
    }
    switch($input) {
        case preg_match('/^[0-9]+$/', $input)?$input:$nomatch:
            doInteger($input);
            break;
        case preg_match('/^[a-zA-Z\s]+$/', $input)?$input:$nomatch:
            doString($input);
            break;
        default:
            echo "Something else...\n";
    }
}

doSomething(10);
doSomething('101');
doSomething('lbh whfg ybfg gur tnzr');
doSomething('x7');